Improved assets

assets/images/gruvbox_dark@thumb.jpg

assets/images/gruvbox_light@220.png

assets/images/gruvbox_light@266.png

assets/images/gruvbox_light@335.png

assets/images/gruvbox_light@352.png

assets/images/gruvbox_light@532.png

assets/images/gruvbox_light@thumb.jpg

assets/images/notifications@363.png

assets/images/notifications@474.png

assets/images/notifications@590.png

assets/images/notifications@thumb.jpg

assets/images/phone@1000.png

assets/images/phone@1220.png

assets/images/phone@220.png

assets/images/phone@300.png

assets/images/phone@400.png

assets/images/phone@520.png

assets/images/phone@640.png

assets/images/phone@800.png

assets/images/phone@thumb.png